Stocker pin dia.

[Jeff Lee]

Originally Posted by Chuck Norton

Jeff,

In my experience a couple of years ago, we were advised that we had to keep the original pin size as per Bub's post. The motor in question was a 307 Oldsmobile that had an approved 6" Chevy rod but we were told that we had to use the stock pin size (.990 as I recall) in order to be legal. I haven't heard of that rule being rescinded.

c

Been down that path w/ NHRA. FE Ford and AMC are two examples I know of. There's not enough material left in the approved rods (stress approved rods)if you run the OEM size pin. That was from Glendora.

[BRUCE PARSONS]

If you go to the complete piston and rod list, the LS1 piston has been approved with the .927 pin. Also the piston is approved with 1/16 1/16 3/16 rings, with optional 1.2 1.5 2.0 ? rings. I guess you can't believe anything NHRA tells you, even if its in writing!!

Bruce

[Bub Whitaker]

Originally Posted by BRUCE PARSONS

If you go to the complete piston and rod list, the LS1 piston has been approved with the .927 pin. Also the piston is approved with 1/16 1/16 3/16 rings, with optional 1.2 1.5 2.0 ? rings. I guess you can't believe anything NHRA tells you, even if its in writing!!

Bruce

I think your correct Bruce... all you need to do is build it, look at (ALL) the sheets...copy and bring them with u to teardown. and hope they don't change their minds,,, again

[RJ]

I got a response back from NHRA today, has to be the .945" pin in this case, looks like I'll be boring the new rods and buying new pins.